class_docstr: Abstract class defining required interface for var readers
code: def __init__(self, file_reader):
      pass
  
imports: from __future__ import division, print_function, absolute_import
  import sys
  import operator
  from scipy._lib.six import reduce
  import numpy
  from scipy.misc import doccer
  from .None import byteordercodes
label_desc: Use image node_id 1 to create a new MatVarReader object from inherited base classes: object with example: obj = MatVarReader(file_reader)